-/*
- * General DV muxer/demuxer
+/*
+ * General DV muxer/demuxer
* Copyright (c) 2003 Roman Shaposhnick
*
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
struct DVDemuxContext {
AVFormatContext* fctx;
AVStream* vst;
- AVStream* ast[2];
+ AVStream* ast[2];
AVPacket audio_pkt[2];
+ uint8_t audio_buf[2][8192];
int ach;
int frames;
uint64_t abytes;
};
enum dv_pack_type {
- dv_header525 = 0x3f, /* see dv_write_pack for important details on */
+ dv_header525 = 0x3f, /* see dv_write_pack for important details on */
dv_header625 = 0xbf, /* these two packs */
dv_timecode = 0x13,
dv_audio_source = 0x50,
dv_audio_rectime = 0x53,
dv_video_source = 0x60,
dv_video_control = 0x61,
- dv_viedo_recdate = 0x62,
+ dv_video_recdate = 0x62,
dv_video_rectime = 0x63,
dv_unknown_pack = 0xff,
};
/*
* The reason why the following three big ugly looking tables are
- * here is my lack of DV spec IEC 61834. The tables were basically
- * constructed to make code that places packs in SSYB, VAUX and
+ * here is my lack of DV spec IEC 61834. The tables were basically
+ * constructed to make code that places packs in SSYB, VAUX and
* AAUX blocks very simple and table-driven. They conform to the
* SMPTE 314M and the output of my personal DV camcorder, neither
* of which is sufficient for a reliable DV stream producing. Thus
* while code is still in development I'll be gathering input from
* people with different DV equipment and modifying the tables to
* accommodate all the quirks. Later on, if possible, some of them
- * will be folded into smaller tables and/or switch-if logic. For
+ * will be folded into smaller tables and/or switch-if logic. For
* now, my only excuse is -- they don't eat up that much of a space.
*/
};
static const int dv_vaux_packs_dist[12][15] = {
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
+ { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
};
static inline uint16_t dv_audio_12to16(uint16_t sample)
{
uint16_t shift, result;
-
+
sample = (sample < 0x800) ? sample : sample | 0xf000;
shift = (sample & 0xf00) >> 8;
buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
(0x0f << 3) | /* reserved -- always 1 */
(0 & 0x07); /* AP1: Audio application ID */
- buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
+ buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
(0x0f << 3) | /* reserved -- always 1 */
(0 & 0x07); /* AP2: Video application ID */
- buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
+ buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
(0x0f << 3) | /* reserved -- always 1 */
(0 & 0x07); /* AP3: Subcode application ID */
break;
case dv_timecode:
- ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
+ ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
(float)c->sys->frame_rate_base));
brktimegm(ct, &tc);
- /*
- * LTC drop-frame frame counter drops two frames (0 and 1) every
+ /*
+ * LTC drop-frame frame counter drops two frames (0 and 1) every
* minute, unless it is exactly divisible by 10
*/
ltc_frame = (c->frames + 2*ct/60 - 2*ct/600) % c->sys->ltc_divisor;
buf[4] = (1 << 7) | /* emphasis: 1 -- off */
(0 << 6) | /* emphasis time constant: 0 -- reserved */
(0 << 3) | /* frequency: 0 -- 48Khz, 1 -- 44,1Khz, 2 -- 32Khz */
- 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
+ 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
break;
case dv_audio_control:
buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
buf[2] = (1 << 7) | /* recording start point: 1 -- no */
(1 << 6) | /* recording end point: 1 -- no */
(1 << 3) | /* recording mode: 1 -- original */
- 7;
+ 7;
buf[3] = (1 << 7) | /* direction: 1 -- forward */
0x20; /* speed */
buf[4] = (1 << 7) | /* reserved -- always 1 */
0x7f; /* genre category */
break;
case dv_audio_recdate:
- case dv_viedo_recdate: /* VAUX recording date */
- ct = c->start_time + (time_t)(c->frames /
+ case dv_video_recdate: /* VAUX recording date */
+ ct = c->start_time + (time_t)(c->frames /
((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
brktimegm(ct, &tc);
buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
break;
case dv_audio_rectime: /* AAUX recording time */
case dv_video_rectime: /* VAUX recording time */
- ct = c->start_time + (time_t)(c->frames /
+ ct = c->start_time + (time_t)(c->frames /
((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
brktimegm(ct, &tc);
buf[1] = (3 << 6) | /* reserved -- always 1 */
0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
- buf[2] = (1 << 7) | /* reserved -- always 1 */
+ buf[2] = (1 << 7) | /* reserved -- always 1 */
((tc.tm_sec / 10) << 4) | /* Tens of seconds */
(tc.tm_sec % 10); /* Units of seconds */
buf[3] = (1 << 7) | /* reserved -- always 1 */
((tc.tm_min / 10) << 4) | /* Tens of minutes */
(tc.tm_min % 10); /* Units of minutes */
- buf[4] = (3 << 6) | /* reserved -- always 1 */
+ buf[4] = (3 << 6) | /* reserved -- always 1 */
((tc.tm_hour / 10) << 4) | /* Tens of hours */
(tc.tm_hour % 10); /* Units of hours */
break;
return 5;
}
-static inline int dv_write_dif_id(enum dv_section_type t, uint8_t seq_num,
+static inline int dv_write_dif_id(enum dv_section_type t, uint8_t seq_num,
uint8_t dif_num, uint8_t* buf)
{
buf[0] = (uint8_t)t; /* Section type */
buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
(0<<4) | /* AP3 (Subcode application ID) */
0x0f; /* reserved -- always 1 */
- }
+ }
else if (syb_num == 11) {
buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
0x7f; /* reserved -- always 1 */
static void dv_format_frame(DVMuxContext *c, uint8_t* buf)
{
int i, j, k;
-
+
for (i = 0; i < c->sys->difseg_size; i++) {
memset(buf, 0xff, 80 * 6); /* First 6 DIF blocks are for control data */
-
+
/* DV header: 1DIF */
buf += dv_write_dif_id(dv_sect_header, i, 0, buf);
buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
buf += 72; /* unused bytes */
-
+
/* DV subcode: 2DIFs */
for (j = 0; j < 2; j++) {
buf += dv_write_dif_id( dv_sect_subcode, i, j, buf);
}
buf += 29; /* unused bytes */
}
-
+
/* DV VAUX: 3DIFs */
for (j = 0; j < 3; j++) {
buf += dv_write_dif_id(dv_sect_vaux, i, j, buf);
for (k = 0; k < 15 ; k++)
buf += dv_write_pack(dv_vaux_packs_dist[i][k], c, buf);
buf += 2; /* unused bytes */
- }
-
+ }
+
/* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
for (j = 0; j < 135; j++) {
if (j%15 == 0) {
+ memset(buf, 0xff, 80);
buf += dv_write_dif_id(dv_sect_audio, i, j/15, buf);
- buf += dv_write_pack(dv_aaux_packs_dist[i][j/15], c, buf);
- buf += 72; /* shuffled PCM audio */
+ buf += 77; /* audio control & shuffled PCM audio */
}
buf += dv_write_dif_id(dv_sect_video, i, j, buf);
buf += 77; /* 1 video macro block: 1 bytes control
for (i = 0; i < c->sys->difseg_size; i++) {
frame_ptr += 6 * 80; /* skip DIF segment header */
for (j = 0; j < 9; j++) {
+ dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3]);
for (d = 8; d < 80; d+=2) {
of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
if (of*2 >= size)
continue;
-
+
frame_ptr[d] = pcm[of*2+1]; // FIXME: may be we have to admit
- frame_ptr[d+1] = pcm[of*2]; // that DV is a big endian PCM
+ frame_ptr[d+1] = pcm[of*2]; // that DV is a big endian PCM
}
frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
}
}
}
-/*
+/*
* This is the dumbest implementation of all -- it simply looks at
* a fixed offset and if pack isn't there -- fails. We might want
* to have a fallback mechanism for complete search of missing packs.
static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t)
{
int offs;
-
+
switch (t) {
case dv_audio_source:
offs = (80*6 + 80*16*3 + 3);
break;
default:
return NULL;
- }
+ }
return (frame[offs] == t ? &frame[offs] : NULL);
}
-/*
+/*
* There's a couple of assumptions being made here:
* 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples.
* We can pass them upwards when ffmpeg will be ready to deal with them.
uint16_t lc, rc;
const DVprofile* sys;
const uint8_t* as_pack;
-
+
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack) /* No audio ? */
return 0;
-
+
sys = dv_frame_profile(frame);
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
-
+
if (quant > 1)
return -1; /* Unsupported quantization */
of = sys->audio_shuffle[i][j] + (d - 8)/2 * sys->audio_stride;
if (of*2 >= size)
continue;
-
+
pcm[of*2] = frame[d+1]; // FIXME: may be we have to admit
pcm[of*2+1] = frame[d]; // that DV is a big endian PCM
if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
pcm[of*2+1] = 0;
} else { /* 12bit quantization */
- lc = ((uint16_t)frame[d] << 4) |
+ lc = ((uint16_t)frame[d] << 4) |
((uint16_t)frame[d+2] >> 4);
rc = ((uint16_t)frame[d+1] << 4) |
((uint16_t)frame[d+2] & 0x0f);
pcm[of*2] = lc & 0xff; // FIXME: may be we have to admit
pcm[of*2+1] = lc >> 8; // that DV is a big endian PCM
- of = sys->audio_shuffle[i%half_ch+half_ch][j] +
+ of = sys->audio_shuffle[i%half_ch+half_ch][j] +
(d - 8)/3 * sys->audio_stride;
pcm[of*2] = rc & 0xff; // FIXME: may be we have to admit
pcm[of*2+1] = rc >> 8; // that DV is a big endian PCM
++d;
}
}
-
+
frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
}
}
{
const uint8_t* as_pack;
const DVprofile* sys;
- int freq, smpls, quant, i;
+ int freq, smpls, quant, i, ach;
sys = dv_frame_profile(frame);
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack || !sys) { /* No audio ? */
c->ach = 0;
- return -1;
+ return 0;
}
-
+
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
- c->ach = (quant && freq == 2) ? 2 : 1;
-
- /* The second stereo channel could appear in IEC 61834 stream only */
- if (c->ach == 2 && !c->ast[1]) {
- c->ast[1] = av_new_stream(c->fctx, 0);
- if (c->ast[1]) {
- av_set_pts_info(c->ast[1], 64, 1, 30000);
- c->ast[1]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[1]->codec.codec_id = CODEC_ID_PCM_S16LE;
- } else
- c->ach = 1;
- }
- for (i=0; i<c->ach; i++) {
- c->ast[i]->codec.sample_rate = dv_audio_frequency[freq];
- c->ast[i]->codec.channels = 2;
- c->ast[i]->codec.bit_rate = 2 * dv_audio_frequency[freq] * 16;
+ ach = (quant && freq == 2) ? 2 : 1;
+
+ /* Dynamic handling of the audio streams in DV */
+ for (i=0; i<ach; i++) {
+ if (!c->ast[i]) {
+ c->ast[i] = av_new_stream(c->fctx, 0);
+ if (!c->ast[i])
+ break;
+ av_set_pts_info(c->ast[i], 64, 1, 30000);
+ c->ast[i]->codec->codec_type = CODEC_TYPE_AUDIO;
+ c->ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
+
+ av_init_packet(&c->audio_pkt[i]);
+ c->audio_pkt[i].size = 0;
+ c->audio_pkt[i].data = c->audio_buf[i];
+ c->audio_pkt[i].stream_index = c->ast[i]->index;
+ c->audio_pkt[i].flags |= PKT_FLAG_KEY;
+ }
+ c->ast[i]->codec->sample_rate = dv_audio_frequency[freq];
+ c->ast[i]->codec->channels = 2;
+ c->ast[i]->codec->bit_rate = 2 * dv_audio_frequency[freq] * 16;
+ c->ast[i]->start_time = 0;
}
-
+ c->ach = i;
+
return (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
}
static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
{
- const DVprofile* sys;
+ const DVprofile* sys;
const uint8_t* vsc_pack;
AVCodecContext* avctx;
int apt, is16_9;
int size = 0;
-
+
sys = dv_frame_profile(frame);
if (sys) {
- avctx = &c->vst->codec;
-
- avctx->frame_rate = sys->frame_rate;
- avctx->frame_rate_base = sys->frame_rate_base;
- avctx->width = sys->width;
- avctx->height = sys->height;
+ avctx = c->vst->codec;
+
+ av_set_pts_info(c->vst, 64, sys->frame_rate_base, sys->frame_rate);
+ avctx->time_base= (AVRational){sys->frame_rate_base, sys->frame_rate};
+ if(!avctx->width){
+ avctx->width = sys->width;
+ avctx->height = sys->height;
+ }
avctx->pix_fmt = sys->pix_fmt;
-
+
/* finding out SAR is a little bit messy */
vsc_pack = dv_extract_pack(frame, dv_video_control);
apt = frame[4] & 0x07;
is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
(!apt && (vsc_pack[2] & 0x07) == 0x07)));
avctx->sample_aspect_ratio = sys->sar[is16_9];
-
+
size = sys->frame_size;
}
return size;
}
-/*
+/*
* The following 6 functions constitute our interface to the world
*/
{
uint8_t pcm[8192];
int fsize, reqasize;
-
+
*frame = &c->frame_buf[0];
if (c->has_audio && c->has_video) { /* must be a stale frame */
dv_format_frame(c, *frame);
c->frames++;
- c->has_audio = c->has_video = 0;
+ if (c->has_audio > 0)
+ c->has_audio = 0;
+ c->has_video = 0;
}
-
- if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
+
+ if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
/* FIXME: we have to have more sensible approach than this one */
if (c->has_video)
- av_log(&st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
-
+ av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
+
dv_inject_video(c, data, *frame);
c->has_video = 1;
data_size = 0;
- }
-
+ if (c->has_audio < 0)
+ goto out;
+ }
+
reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
fsize = fifo_size(&c->audio_data, c->audio_data.rptr);
- if (st->codec.codec_type == CODEC_TYPE_AUDIO || (c->has_video && fsize >= reqasize)) {
+ if (st->codec->codec_type == CODEC_TYPE_AUDIO || (c->has_video && fsize >= reqasize)) {
if (fsize + data_size >= reqasize && !c->has_audio) {
if (fsize >= reqasize) {
fifo_read(&c->audio_data, &pcm[0], reqasize, &c->audio_data.rptr);
dv_inject_audio(c, &pcm[0], *frame);
c->has_audio = 1;
}
-
+
/* FIXME: we have to have more sensible approach than this one */
if (fifo_size(&c->audio_data, c->audio_data.rptr) + data_size >= 100*AVCODEC_MAX_AUDIO_FRAME_SIZE)
- av_log(&st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
+ av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
fifo_write(&c->audio_data, (uint8_t *)data, data_size, &c->audio_data.wptr);
}
+out:
return (c->has_audio && c->has_video) ? c->sys->frame_size : 0;
}
DVMuxContext* dv_init_mux(AVFormatContext* s)
{
DVMuxContext *c;
- AVStream *vst;
- AVStream *ast;
+ AVStream *vst = NULL;
+ AVStream *ast = NULL;
+ int i;
+
+ if (s->nb_streams > 2)
+ return NULL;
c = av_mallocz(sizeof(DVMuxContext));
if (!c)
return NULL;
- if (s->nb_streams != 2)
- goto bail_out;
-
/* We have to sort out where audio and where video stream is */
- if (s->streams[0]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[1]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[0];
- ast = s->streams[1];
+ for (i=0; i<s->nb_streams; i++) {
+ switch (s->streams[i]->codec->codec_type) {
+ case CODEC_TYPE_VIDEO:
+ vst = s->streams[i];
+ break;
+ case CODEC_TYPE_AUDIO:
+ ast = s->streams[i];
+ break;
+ default:
+ goto bail_out;
+ }
}
- else if (s->streams[1]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[0]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[1];
- ast = s->streams[0];
- } else
- goto bail_out;
-
+
/* Some checks -- DV format is very picky about its incoming streams */
- if (vst->codec.codec_id != CODEC_ID_DVVIDEO ||
- ast->codec.codec_id != CODEC_ID_PCM_S16LE)
- goto bail_out;
- if (ast->codec.sample_rate != 48000 ||
- ast->codec.channels != 2)
- goto bail_out;
-
- c->sys = dv_codec_profile(&vst->codec);
+ if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO)
+ goto bail_out;
+ if (ast && (ast->codec->codec_id != CODEC_ID_PCM_S16LE ||
+ ast->codec->sample_rate != 48000 ||
+ ast->codec->channels != 2))
+ goto bail_out;
+ c->sys = dv_codec_profile(vst->codec);
if (!c->sys)
goto bail_out;
-
+
/* Ok, everything seems to be in working order */
c->frames = 0;
- c->has_audio = c->has_video = 0;
+ c->has_audio = ast ? 0 : -1;
+ c->has_video = 0;
c->start_time = (time_t)s->timestamp;
c->aspect = 0; /* 4:3 is the default */
- if ((int)(av_q2d(vst->codec.sample_aspect_ratio) * vst->codec.width / vst->codec.height * 10) == 17) /* 16:9 */
+ if ((int)(av_q2d(vst->codec->sample_aspect_ratio) * vst->codec->width / vst->codec->height * 10) == 17) /* 16:9 */
c->aspect = 0x07;
- if (fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
+ if (ast && fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
goto bail_out;
dv_format_frame(c, &c->frame_buf[0]);
return c;
-
+
bail_out:
av_free(c);
return NULL;
}
void dv_delete_mux(DVMuxContext *c)
-{
+{
fifo_free(&c->audio_data);
}
return NULL;
c->vst = av_new_stream(s, 0);
- c->ast[0] = av_new_stream(s, 0);
- if (!c->vst || !c->ast[0])
- goto fail;
- av_set_pts_info(c->vst, 64, 1, 30000);
- av_set_pts_info(c->ast[0], 64, 1, 30000);
+ if (!c->vst) {
+ av_free(c);
+ return NULL;
+ }
c->fctx = s;
- c->ast[1] = NULL;
+ c->ast[0] = c->ast[1] = NULL;
c->ach = 0;
c->frames = 0;
c->abytes = 0;
- c->audio_pkt[0].size = 0;
- c->audio_pkt[1].size = 0;
-
- c->vst->codec.codec_type = CODEC_TYPE_VIDEO;
- c->vst->codec.codec_id = CODEC_ID_DVVIDEO;
- c->vst->codec.bit_rate = 25000000;
+
+ c->vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ c->vst->codec->codec_id = CODEC_ID_DVVIDEO;
+ c->vst->codec->bit_rate = 25000000;
c->vst->start_time = 0;
-
- c->ast[0]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[0]->codec.codec_id = CODEC_ID_PCM_S16LE;
- c->ast[0]->start_time = 0;
-
- return c;
-
-fail:
- if (c->vst)
- av_free(c->vst);
- if (c->ast[0])
- av_free(c->ast[0]);
- av_free(c);
- return NULL;
-}
-static void __destruct_pkt(struct AVPacket *pkt)
-{
- pkt->data = NULL; pkt->size = 0;
- return;
+ return c;
}
int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
return size;
}
-int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
+int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
uint8_t* buf, int buf_size)
{
int size, i;
const DVprofile* sys = dv_frame_profile(buf);
-
+
if (buf_size < 4 || buf_size < sys->frame_size)
return -1; /* Broken frame, or not enough data */
/* Queueing audio packet */
/* FIXME: in case of no audio/bad audio we have to do something */
size = dv_extract_audio_info(c, buf);
- c->audio_pkt[0].data = c->audio_pkt[1].data = NULL;
for (i=0; i<c->ach; i++) {
- if (av_new_packet(&c->audio_pkt[i], size) < 0)
- return AVERROR_NOMEM;
- c->audio_pkt[i].stream_index = c->ast[i]->index;
- c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec.bit_rate;
- c->audio_pkt[i].flags |= PKT_FLAG_KEY;
+ c->audio_pkt[i].size = size;
+ c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec->bit_rate;
}
- dv_extract_audio(buf, c->audio_pkt[0].data, c->audio_pkt[1].data);
+ dv_extract_audio(buf, c->audio_buf[0], c->audio_buf[1]);
c->abytes += size;
-
+
/* Now it's time to return video packet */
size = dv_extract_video_info(c, buf);
av_init_packet(pkt);
- pkt->destruct = __destruct_pkt;
pkt->data = buf;
- pkt->size = size;
+ pkt->size = size;
pkt->flags |= PKT_FLAG_KEY;
pkt->stream_index = c->vst->id;
- pkt->pts = c->frames * sys->frame_rate_base * (30000/sys->frame_rate);
-
+ pkt->pts = c->frames;
+
c->frames++;
return size;
}
-
-int64_t dv_frame_offset(DVDemuxContext *c, int64_t timestamp)
+
+static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
+ int64_t timestamp, int flags)
{
- const DVprofile* sys;
-
// FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk)
- sys = dv_codec_profile(&c->vst->codec);
+ const DVprofile* sys = dv_codec_profile(c->vst->codec);
+ int64_t offset;
+ int64_t size = url_fsize(&s->pb);
+ int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size;
- // timestamp was scaled by time_base/AV_BASE_RATE by av_seek_frame()
- int64_t frame_number = av_rescale(sys->frame_rate, timestamp,
- (int64_t) 30000 * sys->frame_rate_base);
+ offset = sys->frame_size * timestamp;
- // offset must be a multiple of frame_size else dv_read_packet() will fail
- int64_t offset = (int64_t) sys->frame_size * frame_number;
+ if (offset > max_offset) offset = max_offset;
+ else if (offset < 0) offset = 0;
return offset;
}
+void dv_flush_audio_packets(DVDemuxContext *c)
+{
+ c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
+}
+
/************************************************************
* Implementation of the easiest DV storage of all -- raw DV.
************************************************************/
-
+
typedef struct RawDVContext {
uint8_t buf[144000];
DVDemuxContext* dv_demux;
c->dv_demux = dv_init_demux(s);
if (!c->dv_demux)
return -1;
-
+
if (get_buffer(&s->pb, c->buf, 4) <= 0 || url_fseek(&s->pb, -4, SEEK_CUR) < 0)
return AVERROR_IO;
sys = dv_frame_profile(c->buf);
s->bit_rate = av_rescale(sys->frame_size * 8, sys->frame_rate, sys->frame_rate_base);
-
+
return 0;
}
static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
- RawDVContext *c = s->priv_data;
-
+ RawDVContext *c = s->priv_data;
+
size = dv_get_packet(c->dv_demux, pkt);
-
+
if (size < 0) {
- if (get_buffer(&s->pb, c->buf, 4) <= 0)
+ if (get_buffer(&s->pb, c->buf, 4) <= 0)
return AVERROR_IO;
-
+
size = dv_frame_profile(c->buf)->frame_size;
if (get_buffer(&s->pb, c->buf + 4, size - 4) <= 0)
return AVERROR_IO;
size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
- }
-
+ }
+
return size;
}
-static int dv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp)
+static int dv_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
{
- RawDVContext *c = s->priv_data;
-
- return url_fseek(&s->pb, dv_frame_offset(c->dv_demux, timestamp), SEEK_SET);
+ RawDVContext *r = s->priv_data;
+ DVDemuxContext *c = r->dv_demux;
+ int64_t offset= dv_frame_offset(s, c, timestamp, flags);
+ const DVprofile* sys = dv_codec_profile(c->vst->codec);
+
+ c->frames= offset / sys->frame_size;
+ if (c->ach)
+ c->abytes= av_rescale(c->frames,
+ c->ast[0]->codec->bit_rate * (int64_t)sys->frame_rate_base,
+ 8*sys->frame_rate);
+
+ dv_flush_audio_packets(c);
+ return url_fseek(&s->pb, offset, SEEK_SET);
}
static int dv_read_close(AVFormatContext *s)
{
uint8_t* frame;
int fsize;
-
+
fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[pkt->stream_index],
pkt->data, pkt->size, &frame);
if (fsize > 0) {
- put_buffer(&s->pb, frame, fsize);
+ put_buffer(&s->pb, frame, fsize);
put_flush_packet(&s->pb);
- }
+ }
return 0;
}
-/*
+/*
* We might end up with some extra A/V data without matching counterpart.
* E.g. video data without enough audio to write the complete frame.
- * Currently we simply drop the last frame. I don't know whether this
+ * Currently we simply drop the last frame. I don't know whether this
* is the best strategy of all
*/
static int dv_write_trailer(struct AVFormatContext *s)
projects / ffmpeg / blobdiff